Active viewpoint should not be closed when the annotated page is reloaded

[benel]

This fix seems to be necessary when annotating Cassandre v3 pages, since they are automatically reloaded.

@christophe-lejeune Are Cassandre pages reloaded on a timer or only on update (#76)?

[benel]

I cannot reproduce this problematic behavior... I only saw it that on Valentin's desktop. Any idea why?

[benel]

Or maybe I was just unlucky and there were people editing a memo at the very same time?

[christophe-lejeune]

Cassandre is intended to refresh the page in two different situations :

• You are reading a memo and it is updated by someone else (such a reload does not occur if you are modifying the memo, composing a comment or editing the title of the memo).
• You are browsing the diary page and one of the belonging memos is updated (or a new one is created).

In practice, I have been experienced reloads even in my personal diaries (whose I am the only allowed contributor). Other users confirm to have observed this behavior. This means that Cassandre sometimes refreshes the page even when none of the conditions above are encountered. I suspect the way events are filtered is not restrictive enough... but I have not investigated further. Such reloads remain reasonable, so that no user complain about them.

Of course, this code could evolve in a way facilitating interactions with LaSuli.